SB
AMTM

SIG Brokerage’s Amentum Holdings AMTM Stock Holding History

SIG Brokerage’s Portfolio AMTM Stock Details AMTM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-10,000
Closed -$236K – 997
2025
Q2 		$236K Sell
10,000
-36,000
-78% -$752K 0.01% 598
2025
Q1 		$837K Buy
+46,000
New +$937K 0.04% 282

Other funds holding AMTM

AS
American Securities New York $3.93B AUM 52.22% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $9.73B AUM 55.65% 1-Year Est. Return
Kovitz Investment Group Partners
Kovitz Investment Group Partners Chicago, Illinois $4.31B AUM 20.41% 1-Year Est. Return
TSW
Thompson Siegel & Walmsley Richmond, Virginia $5.7B AUM 6.69% 1-Year Est. Return

SIG Brokerage's AMTM Position: Q2 2025 in Review

SIG Brokerage sold out of Amentum Holdings (AMTM) in Q2 2025, closing a stake of 35,052 shares — an estimated $733K sold.

SIG Brokerage first reported a position in AMTM in Q1 2025 and held it in 1 quarter. The position peaked at $638K in Q1 2025. 460 funds tracked by Wall St. Rank hold AMTM as of Q2 2025.

  • SIG Brokerage reported no remaining Amentum Holdings position as of Q2 2025 after selling out during the quarter.
  • SIG Brokerage sold 35,052 Amentum Holdings shares in Q2 2025, an estimated $733K.
  • SIG Brokerage first reported a position in Amentum Holdings in Q1 2025 and held it in 1 quarter.
  • SIG Brokerage's Amentum Holdings position peaked at $638K in Q1 2025.
  • 460 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2025.

Based on SIG Brokerage's 13F filing for Q2 2025, filed 14 Aug 2025.